Donkey-engine crane



H. A. FHEDERICKS.

DoNNEY ENGINE CRANE, APPLICATION FILED FEB. |01 1920. y

Patented May 3L 1921.

2 SHEETS-SHEET l.

l llll! I NEE-'EM N l il H. A. FREDERICKS.

DONKEY ENGINE CRANE.

APPLICATION FILED FEB. Io, 1920.

Patented May 31, 1921.

2 SHEETS-SHEET 2.

MOT/M Gi should be completed within a brief a citizen of the UnitedStates lUNITED STATES y PATENT OFFICE.

HARRY A. FREDERICKS, OF PORT ANGELES, WASHINGTON.

DONKEY-ENGINE CRANE. Y

Specification of Letters Patent.

Application filed February 10, 1920. Serial No.'357,497.

facilitated, to avoid the inconvenience ordif encountered in connectionwith this narly operaton due to the necessity of jacking or prying upthe drums or of manually lifting the same, as well as the loss of timeincident to an operation which frequently interval in order to avoidinterference with the functions of the apparatus, and to this end theinvention consists in a .craneor transporting frame embodying hoistingmeans and embodying a construction and combination of parts of which apreferred form is illustrated in the accompanying drawings, wherein:

Figure 1 is a side view.

Fig. 2 is a plan view.

Fig. 3 is an end elevation partly in section.

Fig. 4 is a transverse section of the track rails.

Fig. 5 is a detail of the track rails.

Fig. 6 is a similar view of one of the socket plates by which the innerends of the track rails are supported and secured against longitudinaldisplacement.

The apparatus is designed especlally for use in connection with donkeyengines of the type employed as hoisting means in connection withbuilding operations and having the furnace 10, bed plate 11, bearingpedestals 12 and drums 13 of which the latter are usually of metal andof a weight which renders the displacement thereof for the purpose orrepairing or relining the bearings a matter of diiiiculty involving aconsiderable expenditure of time and effort view of a portion of onewhich the vfolstructures whereby they lporting surface,

vrigidity while `suitable points and usually necessitating thediscontinuance for a considerable period of time of the use of theengine. Y f

The crane embodying the invention conslsts essentially of parallel trackyrails 14 supported by standards 15 and 16 provided at their upperextremities with seats 17 for `the reception of the bars forming therails to the end that when not in use the vframe may be folded or theparts disconnected for arrangement within a small space for storage;said railsl being traversed by travelers or carriers 18 from whichdepend `hoisting devices 19.

Obviously the crane may be set up in p0- sition to span the drums of thedonkey engine wherever the latter may be employed,

- and to this end the standards are providedat their lower ends withspurs indicated at 20 for effective engagement with 'the supandlaterally inclined braces 21 may be used in connection with Patented May31, 1921,

the-terminal standards 16 to give transverse-.

connecting the track rails at are transverse brace bars 22 havingterminal cl'ps 23 for engagement with said rails. Also as a means ofincreasing the rigidity of the structure the inner ends of the trackrails may be provided with depending studs 24 for engagementwith sockets25 carried by plates 26 which may be riveted or otherwise permanentlysecured to the wall of the furnace casing 10.

In the construction illustrated the travelers or carriers consist ofrollers 27 from the pintles of which depend yokes 28 which extend underthe rails and serve as means of attachment for the eyes or hooks 29 onthe upper pulley blocks of the hoisting devices. The lower pulley blocksindicated at 31 carry stirrups or hooks 32 for engagement with the drumsor drum spindles, and 0bviously when it is desired to displace a drum togive access to its bearings, the frame having been erected as indicated,the stirrups 32 of the opposite hoisting devices carried respectively bythe travelers or carriers may be engaged with the drum and when thelatter has been raised to a suicient elevation the drum may be movedlongitudinally of the frame and deposited upon a suitable rest orvehicle which may be arranged in the space beyond the base 11 andbetween the same and the terminal standards 16, or may ing devicessuspended from the stirrups and be held in the elevated position. untilthe provided with means for engaging. engine bearingsl have beenrepaired.y drums, said rollers being provided With pe- 40 In theperipheries of the rollers 27 thereripheral sockets for engagement by anoperare provided sockets V33 at intervals for enating pin'. or rod.

gagement by a lever or pin 34 indicated 1n 2. A drum removing crane fordonkey en- Figs. 1 and 2 to serve as a means of movin-g gines comprisingin combination with the the travelers or carriers along the track,l`engine furnace, sockets mounted on said fur- 45 and said pins or leversare also adapted to nace Wall, track rails providedW-ith dependerformthe additional function, in the event ing terminal studs engageable insaid sockthat the track rails should not be exactly ets, standardssupporting said track railsat horizontal, of serving as stops or chockspoints remote from said sockets and having to bear' at their outer endsupon the track means at their upper'ends for detachable'en- 50 rails tohold the carriers or travelers at any gagement With said track rails,transverse j given place upon the rails, to prevent the bracing meansdetachably engaged with and movement of the same beyond the' pointspanning' said rails, and carriers. mounted desired. upon the rails andprovided With drum From the above description it will be seenhoistingmeans. 55 that the apparatus may be conveniently set 3.` Anapparatusforthe purpose indicated up over the engine Whenever requiredWithhaving parallel track rails' and means for out involving anyconsiderable loss of time supporting' the same, carriers or travelersand Without during the period of erection mounted upon said rails andconsisting of serving to interfere With the operation of rollersyprovided with depending stirrups, 60

the engine,V and when desired a drum may hoisting means suspendedfromthe stirrups be removed With but slight lossv of time to andprovided with engine drum engaging ermit of the operator giving theproper elements, the said rollers. being; provided attention to thebearings and then replaced With radially disposed uniformly spaced pe-Without` necessitating any extended period riphera'l sockets, andoperating pins remov- 65 of idleness of the engine and Without imablyengaged in said' sockets for imparting posing any objectionable ,effortupon the angular movement tothe rollers as well as operator..` Y actingaschocks for theisame by engagement What 1s claimed is: vvithl saidrails as herein shown and specil.` An apparatus for the purposedescribed ed. 70

having parallel` tracky rails and means for In testimony whereof I affixmy signasupporting the same, carriers or travelers ture.

mounted upon said rails and consisting of rollers having dependingstirrups, and hoist- HARRY A.- FREDERICKS.

